Finally, cg11251498 (IDO2) showed no significant association with cognition when comparing SCD, MCI, and dementia patients at baseline (model 1, p = 0.60; model 2, p = 0.15) and when comparing future converters and non-converters (model 1, p = 0.81; model 2, p = 0.30) (Table 5). This evidence concerns the gene IDO2 and Schnyder corneal dystrophy.